Passive transport is a spontaneous process that requires no energy input from the cell. In passive transport, materials move down a concentration gradient, from ...
Quadrats are a useful sampling method for plants, but they are not very useful for ... Top down limiting factors affect populations through feeding relationships, ...
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The sucrose molecules will not leave the cell because they cannot pass through ... In facilitated diffusion, substances move into or out of cells down their ... http://programs.northlandcollege.edu/biology/Biology1111/animations/transport1.html.
These channels move the molecules down their electrochemical gradient. This implies that no energy is used in the process and so it is called passive transport.
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C-1 is part of the ring, not in the 'tail'. In the α- form, the hydroxyl (-OH) groups point down, down, up, down from C1 through C4. In the β- form, the hydroxyl ...
The cells of unicellular organisms do not differentiate. Instead ... Chlamydomonas: Starch is broken down by enzymes in cytoplasm to provide energy for growth.
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Late (prometaphase) – nuclear membrane breaks down; spindle fibres (made of ... as is the case of fungal aseptate hyphae (see Page 1.1.1), it does not occur at ...
Interphase is a very active phase of the cell cycle, but it is not part of the process of cell division. ... Tumours develop when control processes break down.
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Ions move down their gradients via channels, leading to a separation of charge that ... More importantly, why the Cl does not move into the cell during action ...
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6 Jun 2008 ... Marcia Abrantes Ornelas UEM; Celso Souza UEM ... to the essential stimulation in children with Down syndrome. ... Retrieved from http://www.periodicos.uem.br/ojs/index.php/RevEducFis/article/view/ ... Vol 12 No 1 (2001).
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Resting channels normally are open and are not influenced significantly by ... to K the resting potential is generated by the efflux of K down its concentration ...
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Membrane potential is the difference in electric potential between the interior and the exterior of ... The membrane serves as both an insulator and a diffusion barrier to the ... In most cases, changes in the conductance of ion channels occur on a faster time scale, so an RC circuit is not a good approximation; however, the ...
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